/*
 * Copyright (C) 2011 Thomas Akehurst
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.github.tomakehurst.wiremock.common;

import java.lang.reflect.Array;

import static java.util.Arrays.copyOf;

public final class ArrayFunctions {

    public static <T> T[] concat(T[] first, T[] second) {
        if (first.length + second.length == 0) {
            return first;
        }
        T[] both = copyOf(first, first.length + second.length);
        System.arraycopy(second, 0, both, first.length, second.length);
        return both;
    }

    public static <T> T[] prepend(T t, T[] original) {
        @SuppressWarnings("unchecked")
        T[] newArray = (T[]) Array.newInstance(original.getClass().getComponentType(), original.length + 1);
        newArray[0]= t;
        System.arraycopy(original, 0, newArray, 1, original.length);
        return newArray;
    }

    private ArrayFunctions() {
        throw new UnsupportedOperationException("not instantiable");
    }
}
